Hooked by Nir Eyal is an in-depth analysis of how to construct habit-forming products that permit for customer retention. The book focuses on the’Hook Model’ explaining in detail how it can apply in the real world and how it has helped companies such as Facebook, Instagram and Snapchat to gather such a large following. It goes onto explain habit forming in more depth developing on the’Habit Loop’ made famous by Charles Duhigg. Following the Hook Model consisting of a activation, action, reward and investment, product forming companies have a model to develop and market in our current system. It’s a technical book, explicitly made for product developers, to create and distribute exceptional products. so, if you have interest in habit formation, then I suggest you read this book.